An electric vehicle charging assembly

Abstract

The application provides an electric vehicle charging assembly, comprising a plug and a socket. The plug is provided with a core shaft connected to a protective ground, the core shaft is arranged in an insulating conduit, the outer periphery of the insulating conduit is provided with an inner coil in a circular structure, the outer periphery of the inner coil is provided with an outer coil in a circular structure, and S+ contacts, S- contacts, CC1 contacts, CC2 contacts, A+ contacts and A- contacts are arranged in an annular isolation area between the outer side of the inner coil and the inner side of the outer coil. The connecting end of the socket is provided with a neodymium magnetic block, the neodymium magnetic block is arranged in a floating assembly, the outer periphery of the floating assembly is provided with an inner conduit, the outer periphery of the inner conduit is provided with an outer conduit at intervals, an annular circuit board is arranged between the inner side of the outer conduit and the outer side of the inner conduit, and the surface of the annular circuit board is respectively provided with contact pieces matched with the contacts. The position precision requirement between the plug and the socket can be effectively reduced, the required connection and separation force is small, and the operation is convenient.

Description

Technical Field

[0001] This invention belongs to the field of electric vehicle charging technology, and particularly relates to an electric vehicle charging component. Background Technology

[0002] With my country's economic development and continuous social progress, automobiles have become an indispensable means of transportation for modern people. Simultaneously, due to the future trends of low-carbon and intelligent automobiles, the popularity of electric vehicles will continue to expand. Therefore, major automobile and component manufacturers have conducted research and application of charging technologies such as conductive charging, wireless charging, and battery swapping for electric vehicles. Conductive charging primarily uses a charging gun to charge the vehicle. The national standard GB / T20234.3—2015 published the "Connecting Devices for Conductive Charging of Electric Vehicles, Part 3: DC Charging Interface." From the aforementioned national standard document, it can be seen that the existing connection between the vehicle socket and the vehicle plug mainly adopts a hole-shaft mating structure. The socket is usually located on the vehicle socket, and the pin is usually located on the vehicle plug. During use, this requires high insertion and extraction force and high precision in the insertion and extraction position, making it inconvenient for quick connection between the plug and socket. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an electric vehicle charging assembly that effectively reduces the positional accuracy requirements between the plug and socket, and requires less force for connection and separation, making it easy to operate.

[0004] In order to achieve the objective of this invention, the following solution is proposed: An electric vehicle charging component includes: a plug and a socket.

[0005] The connector has a core shaft for connecting to the protective ground in the middle. The core shaft is made of silicon steel and passes through the inside of an insulating conduit. The outer circumference of the insulating conduit has an inner coil with a circular structure for connecting to the positive terminal of the DC power supply. The outer circumference of the inner coil has an outer coil with a circular structure for connecting to the negative terminal of the DC power supply. An annular isolation area is formed between the outer side of the inner coil and the inner side of the outer coil. The annular isolation area is equipped with S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact.

[0006] The socket connection terminal is provided with a neodymium magnet that is in contact with the front end face of the spindle. The neodymium magnet is located in a floating assembly and is oscillating within the floating assembly. The outer layer of the floating assembly has insulating properties. An inner guide tube that is in contact with the front end face of the inner coil is provided on the outer periphery of the floating assembly. An outer guide tube that is in contact with the front end face of the outer coil is provided at intervals on the outer periphery of the inner guide tube. A ring circuit board with a circular structure is provided between the inner side of the outer guide tube and the outer side of the inner guide tube. The surface of the ring circuit board is provided with contact pieces that are in contact with the S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact.

[0007] The inner coil, outer coil, S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact, and A- contact are all made of copper.

[0008] Furthermore, the contact piece has an arc structure, and the axis of the arc is coaxial with the socket.

[0009] Furthermore, the connector end face of the plug has a conical hole, and the front ends of the inner coil, outer coil, S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact all protrude from the bottom surface of the conical hole and are located inside the connector end face of the plug. The outer wall of the connector end of the socket has a conical platform that matches the conical hole.

[0010] Furthermore, the front ends of both the inner and outer coils are provided with multiple copper plates spaced apart on the inner side of their respective rings, and the ends of the copper plates facing the middle of the plug are all inclined towards the front end of the plug.

[0011] Furthermore, the mandrel is moved along the axial direction.

[0012] Furthermore, the plug is equipped with a telescopic motor, the main shaft of which can move along the axis. The front end of the main shaft is connected to the spindle, and the rear end of the main shaft is connected to the grounding wire.

[0013] Furthermore, a conductive tube is provided at the rear end of the telescopic motor corresponding to its main shaft. The outer wall of the conductive tube is provided with an insulating layer. The rear section of the telescopic motor's main shaft slides through the conductive tube, and the end of the conductive tube is connected to the grounding wire.

[0014] Furthermore, the floating component includes an insulating outer shell with a spherical cavity inside. An inner liner tube is provided inside the cavity, and the outer wall of the inner liner tube is spherical. A neodymium magnet is inserted through the front end of the inner liner tube, and a corrugated spring is inserted through the rear end of the inner liner tube. The front end of the corrugated spring contacts the rear end of the neodymium magnet, and the rear end of the corrugated spring is connected to the grounding terminal of the socket.

[0015] Furthermore, the front end face of the insulating conduit is fitted with an annular groove.

[0016] Furthermore, the rear end of the socket is equipped with a plug corresponding to the neodymium magnet, inner conduit, outer conduit, and each contact piece, for connecting to the existing national standard charging port on the electric vehicle.

[0017] The beneficial effects of this invention are as follows: the magnetic attraction between the spindle and the neodymium magnet enables the plug and socket to be connected quickly. Compared with plug and socket with plug-in structure, the connection is faster and the force required for separation is also smaller. Moreover, it avoids the plug-in structure with hole-shaft cooperation, reduces the positional accuracy requirements during connection, and is more convenient to use. Attached Figure Description

[0018] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0019] Figure 1 A schematic diagram of the overall structure of this application is shown.

[0020] Figure 2 A schematic diagram of the other end of the overall structure of this application is shown.

[0021] Figure 3 A schematic diagram of the internal structure of the plug of this application is shown.

[0022] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0023] Figure 5 A schematic diagram of the socket connection terminal of this application is shown.

[0024] Figure 6 A cross-sectional view of the socket structure of this application is shown.

[0025] Figure 7 A schematic diagram of the internal structure of the socket in this application is shown.

[0026] Figure 8 An overall cross-sectional view of the plug and socket of this application is shown.

[0027] Figure 9 It shows Figure 8 A magnified view of a section at point B.

[0028] Figure 10 It shows Figure 8 A magnified view of a section at point C.

[0029] Figure 11 The layout of the various contacts of the plug of this application is shown.

[0030] The markings in the diagram are: Plug-1, Spindle-11, Insulating conduit-12, Annular groove-121, Inner coil-13, Outer coil-14, Telescopic motor-15, Conductive tube-151, Socket-2, Neodymium magnet-21, Inner conduit-22, Outer conduit-23, Annular circuit board-24, Contact piece-25, Floating assembly-3, Outer shell-31, Inner liner tube-32, Corrugated spring-33, National standard charging head-4. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0032] like Figures 1 to 9 As shown, an electric vehicle charging assembly includes: a plug 1 and a socket 2.

[0033] Specifically, such as Figure 3 , Figure 4 As shown, the connector 1 has a core 11 for connecting to the protective ground at its center. The core 11 is made of silicon steel and passes through the interior of the insulating conduit 12. An inner coil 13 with a circular structure is located on the outer periphery of the insulating conduit 12 for connecting to the positive terminal of the DC power supply. An outer coil 14 with a circular structure is located at intervals on the outer periphery of the inner coil 13, and the outer coil 14 is connected to the negative terminal of the DC power supply. An annular isolation zone is formed between the outer side of the inner coil 13 and the inner side of the outer coil 14. Figure 11 The annular isolation zone shown is provided with S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact at intervals.

[0034] Specifically, such as Figures 5 to 9 As shown, the connector of the socket 2 is provided with a neodymium magnet 21 that is attached to the front end face of the spindle 11. The neodymium magnet 21 is located in a floating assembly 3 and is oscillating within the floating assembly 3. The outer layer of the floating assembly 3 has insulating properties. The outer periphery of the floating assembly 3 is provided with an inner guide tube 22 that is attached to the front end face of the inner coil 13. The outer periphery of the inner guide tube 22 is provided with an outer guide tube 23 that is attached to the front end face of the outer coil 14 at intervals. Between the inner side of the outer guide tube 23 and the outer side of the inner guide tube 22, there is a ring circuit board 24 with a circular structure. The surface of the ring circuit board 24 is provided with contact pieces 25 that are attached to the S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact respectively. A protective sticker 241 is attached to the surface of the ring circuit board 24 to provide protection.

[0035] The inner coil 13, outer coil 14, S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact are all made of copper, which not only has good conductivity, but also prevents magnetic attraction between them and neodymium magnet 21.

[0036] The magnetic attraction between the spindle 11 and the neodymium magnet 21 enables the plug 1 and the socket 2 to be quickly connected. Compared with plug-and-play plugs and sockets, the connection is faster and the force required for separation is smaller, making it more convenient to use.

[0037] To ensure the accurate circumferential position of plug 1 and socket 2, alignment marks or limiting structures can be set on the outer walls of plug 1 and socket 2, so that plug 1 and socket 2 have only one matching connection structure. For example, a positioning pin can be set at the front end of plug 1 and a positioning hole can be set on the end face of socket 2. The positioning pin and the positioning hole can be matched to ensure the accuracy of the matching position of plug 1 and socket 2.

[0038] Preferred, such as Figure 5 As shown, the contact piece 25 has an arc structure to increase the area of ​​the contact piece 25, and the axis of its arc is coaxial with the socket 2, so as to facilitate the S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact to fit with the corresponding contact piece 25, so as to better adapt to the positional error between the plug 1 and the socket 2.

[0039] Preferred, such as Figure 1 , Figure 2 and Figure 5 As shown, the connecting end face of plug 1 has a conical hole. The front ends of the inner coil 13, outer coil 14, S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact, and A- contact all protrude from the bottom surface of the conical hole and are located inside the end face of plug 1. This serves to protect the inner coil 13, outer coil 14, S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact, and A- contact, and prevent contact with the human body, thereby improving safety. The outer wall of the connecting end of socket 2 has a conical platform that matches the conical hole, which can improve the coaxial accuracy between plug 1 and socket 2 and facilitate quick connection between plug 1 and socket 2.

[0040] Preferred, such as Figure 4 As shown, the front ends of the inner coil 13 and the outer coil 14 are each provided with multiple copper plates spaced apart on the inner side of their respective rings. The ends of the copper plates facing the middle of the plug 1 are all inclined towards the front end of the plug 1. Because the copper plates themselves have elasticity, this inclined structure can better fit with the corresponding inner conduit 22 and outer conduit 23 when connecting to the socket 2 by utilizing the elastic deformation of the copper plates. On the other hand, when the copper plates come into contact with the inner conduit 22 and outer conduit 23, the copper plates are compressed and will undergo slight displacement, which can play a role in cleaning the surface of the inner conduit 22 and outer conduit 23.

[0041] Preferably, the spindle 11 is movable along the axial direction. When the plug 1 is connected to the socket 2, when the spindle 11 moves along the axial direction and retracts into the plug 1, the spindle 11 is separated from the neodymium magnet 21, making it easier for the plug 1 to be easily separated from the socket 2, and saving more of the force required to pull out the plug 1.

[0042] Specifically, such as Figure 8 As shown, the plug 1 is equipped with a telescopic motor 15. The main shaft of the telescopic motor 15 can move along the axis. The front end of the main shaft of the telescopic motor 15 is connected to the spindle 11, and the rear end of the main shaft is connected to the grounding wire. The telescopic motor 15 controls the spindle 11 to move automatically, thereby facilitating the automatic connection between the plug 1 and the socket 2.

[0043] More specifically, such as Figure 8 , Figure 10 As shown, the telescopic motor 15 has a conductive tube 151 at the rear end of its main shaft. The outer wall of the conductive tube 151 is provided with an insulating layer. The rear section of the main shaft of the telescopic motor 15 slides through the conductive tube 151. The end of the conductive tube 151 is connected to the grounding wire. This structure can ensure that the position of the grounding wire remains fixed when the main shaft of the telescopic motor 15 moves, avoiding repeated bending of the grounding wire, thereby playing a protective role for the grounding wire.

[0044] Specifically, such as Figure 9 As shown, the floating assembly 3 includes an insulating outer shell 31 with a spherical cavity inside. An inner liner tube 32 is provided inside the cavity, and the outer wall of the inner liner tube 32 is spherical. A neodymium magnet 21 is inserted through the front end of the inner liner tube 32, and a corrugated spring 33 is inserted through the rear end of the inner liner tube 32. The front end face of the corrugated spring 33 contacts the rear end face of the neodymium magnet 21, and the rear end face of the corrugated spring 33 is connected to the grounding terminal of the socket. This structure gives the neodymium magnet 21 the freedom to swing and move along the axis in the floating assembly 3. Even if the axis between the plug 1 and the socket 2 is tilted when they are connected, the swing of the neodymium magnet 21 can be used to adapt, so that the end face of the neodymium magnet 21 fits better with the end face of the spindle 11. When the neodymium magnet 21 swings, the axis of the corrugated spring 33 will bend to adapt to the swing of the neodymium magnet 21.

[0045] Preferred, such as Figure 9 As shown, the front end face of the insulating conduit 12 is provided with an annular groove 121, so as to extend the distance between the insulating surfaces of the inner coil 13 and the core shaft 11 by utilizing the inner wall and bottom dimensions of the annular groove 121, thereby increasing the creepage distance between the inner coil 13 and the core shaft 11, preventing the two poles from conducting, and improving the safety of use.

[0046] As another preferred embodiment of this application, such as Figure 6 , Figure 7As shown, the rear end of socket 2 is equipped with a plug corresponding to the neodymium magnet 21, inner conduit 22, outer conduit 23, and each contact piece 25, for connecting as follows: Figure 1 , Figure 2 The electric vehicle shown already has a national standard charging head 4. This structure uses the socket 2 as an adapter because existing electric vehicles are already compatible with national standard charging ports, making it inconvenient to replace them with socket 2, and replacement would also incur costs. In order to adapt to the national standard charging ports of existing electric vehicles, the other end of the socket 2 is designed to match the national standard charging port, so that existing electric vehicles can be used without replacing them with socket 2.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. An electric vehicle charging component, comprising: The plug (1) and socket (2) are characterized in that, The connector (1) has a core (11) for connecting to the protective ground in the middle of the connection end. The core (11) is made of silicon steel and passes through the inside of the insulating conduit (12). The outer periphery of the insulating conduit (12) has an inner coil (13) with a circular structure for connecting to the positive terminal of the DC power supply. The outer periphery of the inner coil (13) has an outer coil (14) with a circular structure. The outer coil (14) is connected to the negative terminal of the DC power supply. An annular isolation area is formed between the outer side of the inner coil (13) and the inner side of the outer coil (14). The annular isolation area is provided with S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact. The socket (2) has a neodymium magnet (21) in the connection end that is in contact with the front end face of the spindle (11). The neodymium magnet (21) is located in a floating component (3). The neodymium magnet (21) is oscillating in the floating component (3). The outer layer of the floating component (3) has insulating properties. The outer periphery of the floating component (3) is provided with an inner guide tube (22) that is in contact with the front end face of the inner coil (13). The outer periphery of the inner guide tube (22) is provided with an outer guide tube (23) that is in contact with the front end face of the outer coil (14). The inner side of the outer guide tube (23) and the outer side of the inner guide tube (22) are provided with a ring circuit board (24) with a circular structure. The surface of the ring circuit board (24) is provided with contact pieces (25) that are in contact with the S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact respectively. The inner coil (13), outer coil (14), S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact are all made of copper.

2. The electric vehicle charging component according to claim 1, characterized in that, The contact piece (25) has an arc structure, and the axis of its arc is coaxial with the socket (2).

3. The electric vehicle charging component according to claim 1, characterized in that, The connector (1) has a conical hole on its connecting end face. The front ends of the inner coil (13), outer coil (14), S+ contact, S- contact, CC1 contact, CC2 contact, A+ contact and A- contact all protrude from the bottom surface of the conical hole and are located inside the end face of the connector (1). The outer wall of the connector (2) has a conical platform that matches the conical hole.

4. The electric vehicle charging component according to claim 1, characterized in that, The inner coil (13) and the outer coil (14) are each provided with multiple copper plates at intervals on the inner side of their respective rings. The copper plates are all inclined towards the front end of the plug (1) at the middle.

5. An electric vehicle charging assembly according to claim 1, characterized in that, The spindle (11) is moved along the axial direction.

6. The electric vehicle charging assembly according to claim 5, characterized in that, The plug (1) is equipped with a telescopic motor (15). The main shaft of the telescopic motor (15) can move along the axis. The front end of the main shaft of the telescopic motor (15) is connected to the spindle (11), and the rear end of the main shaft is connected to the grounding wire.

7. An electric vehicle charging component according to claim 6, characterized in that, The telescopic motor (15) has a conductive tube (151) at the rear end of its main shaft. The outer wall of the conductive tube (151) is provided with an insulating layer. The rear section of the main shaft of the telescopic motor (15) slides through the conductive tube (151). The end of the conductive tube (151) is connected to the grounding wire.

8. The electric vehicle charging component according to claim 1, characterized in that, The floating component (3) includes an insulating shell (31) with a spherical cavity inside the shell (31) and an inner liner tube (32) inside the cavity. The outer wall of the inner liner tube (32) is spherical. A neodymium magnet (21) is inserted through the front end of the inner liner tube (32). A corrugated spring (33) is inserted through the rear end of the inner liner tube (32). The front end face of the corrugated spring (33) contacts the rear end face of the neodymium magnet (21). The rear end face of the corrugated spring (33) is connected to the grounding terminal of the socket.

9. An electric vehicle charging component according to claim 1, characterized in that, The front end face of the insulating conduit (12) is provided with an annular groove (121).

10. An electric vehicle charging assembly according to claim 1, characterized in that, The back end of the socket (2) is equipped with a plug rod corresponding to the neodymium magnet (21), inner conduit (22), outer conduit (23) and each contact piece (25), which is used to connect the existing national standard charging head (4) on the electric vehicle.

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